Seiko Cal. 5684 - 421

The Seiko 5684-421 represents an important milestone in Seiko's 1972 lineup. It features a Black dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-f215c6ac549d]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1972

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